We have 3 different solutions:
1) The standard black round bulb included with every Vacuum Bell
2) Plastic hand pump without manometer more powerful than the standard pump
3) Metal hand pump with manometer, the most powerful and resistant one, we recommend it for our larger models, it's the only one with a manometer, it can be used for scientific research as well.
1) The standard black round bulb included with every Vacuum Bell
2) Plastic hand pump without manometer more powerful than the standard pump
3) Metal hand pump with manometer, the most powerful and resistant one, we recommend it for our larger models, it's the only one with a manometer, it can be used for scientific research as well.
